665070607213 has 2 divisors, whose sum is σ = 665070607214. Its totient is φ = 665070607212.

The previous prime is 665070607183. The next prime is 665070607321. The reversal of 665070607213 is 312706070566.

Together with next prime (665070607321) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643953286089 + 21117321124 = 802467^2 + 145318^2 .

It is a cyclic number.

It is not a de Polignac number, because 665070607213 - 2²¹ = 665068510061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665070607213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665070607613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332535303606 + 332535303607.

It is an arithmetic number, because the mean of its divisors is an integer number (332535303607).

Almost surely, 2^665070607213 is an apocalyptic number.

It is an amenable number.

665070607213 is a deficient number, since it is larger than the sum of its proper divisors (1).

665070607213 is an equidigital number, since it uses as much as digits as its factorization.

665070607213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 43.

Adding to 665070607213 its reverse (312706070566), we get a palindrome (977776677779).

The spelling of 665070607213 in words is "six hundred sixty-five billion, seventy million, six hundred seven thousand, two hundred thirteen".